Boy, 14, and man die from carbon monoxide poisoning as they sit in cars being cleared of snow in Boston

Boston police are warning residents to shovel snow away from their car's exhaust pipe before starting the vehicle after a series of incidents have left two people dead and two young children injured.

An unidentified boy, 14, died Saturday morning after suffering carbon monoxide poisoning. The teen had gone inside the running car to keep warm as his father continued to shovel snow, according to police.

The boy got into the car after his father had cleared the passenger side, leaving the tailpipe covered by the snow bank.

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Trapped: A teen was killed by carbon monoxide poisoning when he got into this car to escape the cold before the tail pipe had been cleared

As the father continued shoveling, the boy became sick and stopped breathing.

By the time firefighters responded to the scene the boy was in cardiac arrest. The father, likely due to stress, went into respiratory arrest.

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Too late: Boston FD Dist. Chief Paul Miner said that by the time firemen arrived the teen was already in cardiac arrest

He was pronounced dead at Boston Medical Center, where his father remains in serious condition with a heart issue.

'This is definitely a tragic incident and something that we hate to
see, especially when we believe it is avoidable,' said Jennifer Mehigan, a Boston EMS spokesperson.

Later that afternoon, a man was found dead in a car with a tailpipe blocked by snow, which authorities believe allowed a deadly gas buildup in the vehicle.

Careful: Officials say people are not used to clearing so much snow and don't remember to clear cars before starting them

In a non-fatal incident, two boys, ages 5 and 8, were rushed to a hospital with carbon monoxide poisoning when they were found in a car where they were trying to keep warm.

'People have not seen this much snow in a long time. They’re not
focused on making sure they clear the snow from the exhaust pipe before
putting anyone inside,' police spokesman Cheryl Fiandaca told CBS Boston. 'Carbon monoxide fills the car
pretty quickly…People are not focused on it when they are shoveling.'